Final answer:
The association between heather and moss is based on ecological reasons such as mosses colonizing bare environments and providing shelter and nutrients for animals. Mosses also contribute to soil enrichment and act as indicators of pollution. Heather benefits from the erosion control and nutrient storage provided by mosses.
Step-by-step explanation:
The association between heather and moss can be explained by ecological reasons. Mosses are pioneering species that colonize bare or devastated environments, providing shelter and nutrients for animals in hostile environments. They also contribute to soil enrichment and are important indicators of environmental pollution. Heather, on the other hand, benefits from the ability of mosses to slow down erosion and store moisture and soil nutrients, creating a favorable environment for its growth.